function adjustLayout() {  
   // Get natural heights  
   var rHeight = xHeight("rightContent");  
   var lHeight = xHeight("leftNav");  

   // Find the maximum height  
   if (rHeight < 600) { 
     xHeight("rightContent", 600);
     rHeight = 600;
   }
   
   xHeight("repeater", (rHeight - lHeight + 19));
     
}

function setupXs() {
  xAddEventListener(window, "resize", adjustLayout, false);
  adjustLayout();
}